"[The Euclidean algorithm] is the granddaddy of all algorithms, because it is the oldest nontrivial algorithm
that has survived to the present day."
-- Donald Knuth, The Art of Computer Programming, Vol. 2: Seminumerical Algorithms, 2nd edition (1981).

The greatest common divisor (GCD), also known as
the greatest common factor of two or more integers (at least one of which is not zero), is the largest positive
integer that divides a number without a remainder. For example, the GCD of 8 and 12 is 4.

You are given an arbitrary number of positive integers.
You should find...

An arbitrary number of positive integers.

The greatest common divisor as an integer.

great_common_divisor(6, 4) == 2
great_common_divisor(2, 4, 8) == 2

GCD is a basic concept found in mathematically oriented software. This is a good example of a simple algorithm which
has many possible applications.

1 < len(args) ≤ 10
all(0 < x ≤ 2 ** 32 for x in args)

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